Microbiology of Soils
Most soil protozoa are flagellates or amoebas, having their dominant mode of nitrogen as

ingestion of mold
ingestion of fungi
ingestion of bacteria
all of these

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Microbiology of Soils
Denitrification is

reduction of nitrate to organic nitrogen compounds
both (a) and (b)
reduction of nitrate (NO3-) to nitrogen gas
changing of atmospheric nitrogen (N2) to nitrogen compounds

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